传入一个时间类型字符串获取时间戳

def time_chuo(d):
    """
    传入字符串返回时间戳
    """
    if ":" in d:
        d = time.mktime(time.strptime(d, '%Y-%m-%d %H:%M:%S'))
    else:
        d = time.mktime(time.strptime(d, "%Y-%m-%d"))
    return d